CN109824946B - Preparation method of multifunctional memory type rearview mirror - Google Patents
Preparation method of multifunctional memory type rearview mirror Download PDFInfo
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- CN109824946B CN109824946B CN201910118892.8A CN201910118892A CN109824946B CN 109824946 B CN109824946 B CN 109824946B CN 201910118892 A CN201910118892 A CN 201910118892A CN 109824946 B CN109824946 B CN 109824946B
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- rearview mirror
- mirror
- rubber
- memory type
- multifunctional memory
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 20
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 20
- 229920001194 natural rubber Polymers 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 12
- 239000010935 stainless steel Substances 0.000 claims abstract description 12
- 238000001746 injection moulding Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 7
- 238000013329 compounding Methods 0.000 claims abstract description 4
- 229920001971 elastomer Polymers 0.000 claims description 28
- 239000005060 rubber Substances 0.000 claims description 28
- 239000002994 raw material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000011257 shell material Substances 0.000 abstract description 18
- 238000005520 cutting process Methods 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 7
- 229910052901 montmorillonite Inorganic materials 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 239000004594 Masterbatch (MB) Substances 0.000 description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 3
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000088 plastic resin Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation method of a multifunctional memory type rearview mirror, which comprises the following steps: weighing natural rubber, butadiene rubber and 50.5 parts of compounding agent, and then cutting, plasticating and mixing the natural rubber; and fixing a stainless steel rearview mirror in a die, and blowing air from the mounting hole to perform double-channel injection molding on two opposite sides. Curing and molding for 10 minutes at 170-180 ℃ and 10-15 MPa. The process is simple, the production efficiency is high, and the prepared reversing mirror shell has good elasticity, high strength, long service life and strong rebound resilience. The lowest tensile strength of the backing mirror shell material reaches 20.9MPa, and the highest wear resistance reaches 0.11cm3The elastic resilience is as high as 95%, the installed stainless steel lens has the advantages of collision resistance, no water sticking to the lens in rainy days, and strong practicability.
Description
Technical Field
The invention relates to the field of rearview mirrors, in particular to a preparation method of a multifunctional memory type rearview mirror.
Background
The rearview mirror plays an important role for the driver as an auxiliary device for the driver to observe the surrounding situation of the automobile body, and is called as the 'second eyes' of the driver. By means of the automobile backing mirror, the visual field range of a driver can be expanded, so that the safety of the driver when driving an automobile can be improved, and the automobile backing mirror is widely used by people. With the improvement of comprehensive national power and the improvement of scientific technology in China, the number of automobiles is increased year by year, so that the driving and parking spaces of the automobiles are smaller and smaller, and the rearview mirrors of the automobiles are difficult to rub and collide in the driving and storing processes. In addition, when the automobile runs in a rainy day, the rearview mirror is stained with rainwater and becomes fuzzy, so that the visibility is influenced, and the driving safety is reduced. In order to solve the problems, more and more researchers begin to research the rearview mirror, and various rearview mirrors begin to appear, but most anti-collision rearview mirrors in domestic and foreign markets are structurally adjusted, and although the damage of the rearview mirror during collision can be reduced during use, the rearview mirror needs to be adjusted in advance to avoid collision damage, so that the rearview mirror has a blind area, and certain safety problems are caused. The rearview mirror shell is made of plastic resin, is easy to age, and is damaged and difficult to repair once being rubbed and bumped. Especially in cold winter in the north, the plastic resin can become brittle in low temperature weather conditions, which can make adjustment difficult and can damage the mirror housing of the reversing mirror. In addition, although the rearview mirror shell cannot be damaged in the wiping process by adopting the common glass mirror, the glass rearview mirror still can be broken. Meanwhile, if the vehicle runs in rainy days, the ordinary glass backing mirror can be stained with rainwater to obscure the view of the backing mirror, and the driving safety is reduced.
Patent CN201620224613.8 discloses a new type of rearview mirror, which can adjust the auxiliary rearview mirror to reduce the space when the vehicles meet. However, the reduced space is limited, and the design of the adjusting structure has certain disadvantages, because sometimes the occurrence of the rubbing is very sudden and can not be avoided in time, the damage of the rearview mirror can be caused.
The existing rearview mirrors on the market, whether sold or designed in research, are rarely found to be solved from raw materials in terms of collision resistance, namely, the structural design of the rearview mirrors is changed, auxiliary mirrors are installed or a radar prompting system is added. In the aspect of rain prevention, resistance wires are mostly added for heating, a blower is added, a windshield wiper is installed, and the like, and a waterproof film is also attached to the market at present. While these designs may solve some problems, they not only increase manufacturing costs, but also introduce safety issues, such as the installation of a wiper may affect the surrounding view, and the waterproofing membrane may not be lifelong or may come off.
Therefore, the multifunctional memory type rearview mirror material is prepared, the mirror shell is mainly made of natural rubber, the strength is high, the use requirement can be met, and the elasticity and the flexibility are good. In order to ensure that the elasticity, wear resistance, aging resistance and low temperature resistance of the product are more excellent and simultaneously reduce the cost of raw materials, the invention adopts blending of the butadiene rubber and the natural rubber. The invention solves the collision problem of the rearview mirror by starting from raw materials and a forming method according to the performance of rubber, and can solve the collision problem without improving the structural design. Meanwhile, in order to prevent the common glass lens from being broken by collision and being blurred in rainy days, the invention decides to adopt a stainless steel lens to replace the traditional glass lens. The multifunctional memory type rearview mirror prepared by the invention solves the problems that the existing rearview mirror is easy to damage in collision and is blurred in rainy days. In order to ensure that the rearview mirror has certain elasticity and certain strength, the traditional processing method and process of rubber are changed in the preparation method, so that the rubber not only has elasticity, but also the strength of the rubber meets the use requirement. The multifunctional memory type rearview mirror shell prepared by the invention adopts two rubbers to be used together, the stainless steel rearview mirror is firstly placed into a mould, then the two opposite double-flow-passage injection moulding is adopted under certain temperature and pressure, and then the stainless steel rearview mirror is solidified into the rearview mirror.
Disclosure of Invention
The invention provides a preparation method of a rearview mirror with better elasticity, high strength and collision resistance, and aims to solve the problems that the existing rearview mirror shell material is fragile in collision, is not easy to adjust in winter in the north, and the rearview mirror is fuzzy in rainy days. The prepared backing mirror shell has better elasticity and strength and long service time, can recover the original shape instantly after collision, and has no phenomenon of crushing because the backing mirror shell is a rubber product. The manufactured rearview mirror can meet the requirements of various types of rearview mirrors in any area for use all the year round according to requirements.
In the preparation method, the plastication of the natural rubber in the open mill is carried out at the temperature of 25-35 ℃ for 30 minutes, and the normal temperature of 45-55 ℃ is changed for 15-25 minutes, so that the reason is that the low-temperature plastication mainly adopts mechanical force to prevent oxygen action and reduce the rubber performance. The cis-butadiene rubber has excellent plasticity without plastication, and is mixed with plasticated natural rubber together by a reverse mixing method without adding sulfur and montmorillonite in an internal mixer. The reverse mixing method can increase mixing capacity, shorten mixing time and improve mixing efficiency, and has good dispersibility of compounding agent. And (2) when the rubber discharging temperature of the internal mixer is 110-120 ℃, after mixing for 10 minutes, the rubber discharging temperature is reduced to 95 ℃, the vulcanizing agent system is prevented from not fully playing a role when the temperature is too high, and then sulfur and montmorillonite are added into the internal mixer to continuously mix for 8-10 minutes in an open mill. By controlling the adding sequence, temperature and time of the accessory ingredient, the dispersing effect of the accessory ingredient is ensured and the effect is fully exerted.
According to the preparation method, the stainless steel rearview mirror is fixed in a mold in advance, then the rubber compound is injected into the mold at 170-180 ℃, and the rubber compound is cured and molded under the pressure of 10-15 MPa for 10-12 minutes. In the molding process, the mounting hole of the rearview mirror shell is ensured to be blown by the air of the blower, so that the rearview mirror and the shell have a certain hollow layer. In addition, the mold in the injection molding machine is injection molded using two opposing sides with a double flow path. Therefore, the whole die cavity can be tightly filled with the sizing material for preparing the rearview mirror shell, the conditions of material shortage and material breakage can be avoided, and the stainless steel rearview mirror is ensured to be wrapped by the sizing material.
The technical scheme adopted by the invention is as follows: a preparation method of a multifunctional memory type rearview mirror shell comprises the following steps: (1) drying and cutting the natural rubber and the cis-polybutadiene rubber respectively for later use, wherein the formula comprises 60 parts of the natural rubber and 40 parts of the cis-polybutadiene rubber, and the using amount of other accessory ingredients is 50.5 parts, and the main ingredients of the accessory ingredients comprise carbon black, montmorillonite, sulfur, stearic acid, calcium bicarbonate, a silane coupling agent KH550, an anti-aging agent D and an antioxidant according to the mass ratio of 10:20:10:2.5: 1.5:5: 0.5; (2) plasticating the natural rubber obtained in the step (1) in an open mill with the temperature of 25-35 ℃ and the roller spacing of 3-5 mm for 30 minutes to obtain natural rubber plasticated rubber; (3) adding carbon black, stearic acid, calcium bicarbonate, partial montmorillonite treated by a silane coupling agent KH550, an anti-aging agent D and an antioxidant into an internal mixer at the temperature of 110-120 ℃, adding the natural rubber plasticated rubber obtained in the step (2) and butadiene rubber into the internal mixer together, and mixing for 5 minutes to obtain master batch; (4) adding sulfur and the rest of montmorillonite into the masterbatch obtained in the step (3) and continuously mixing for 8-10 minutes; (5) and (3) cutting the rubber sheet obtained in the step (4) into rubber strips with the width of 10 cm, putting the cut rubber strips into a feed inlet of an injection molding machine, injecting the rubber strips into a mold with the temperature of 170-180 ℃, and curing and molding under the pressure of 10-15 MPa for 10 minutes.
Detailed Description
The present invention will be further described in detail with reference to the following examples.
Example 1
Drying and cutting the natural rubber respectively for later use; placing the cut natural rubber into an open mill with the temperature of 30 ℃ and the roller spacing of 3-5 mm for plasticating for 30 minutes to obtain natural rubber plasticated rubber; adding carbon black, stearic acid, calcium bicarbonate, partial montmorillonite treated by a silane coupling agent KH550, an anti-aging agent D and an antioxidant into an internal mixer at the temperature of 110 ℃, and then adding natural rubber plasticated rubber and butadiene rubber into the internal mixer together to prepare master batch; adding the weighed sulfur and the rest part of montmorillonite into the mixture, and continuously mixing for 8 minutes, wherein the total amount of the compounding agents is 50.5 parts; and finally, cutting the obtained rubber sheet into rubber strips with the width of 10 cm, putting the rubber strips into a feed inlet of an injection molding machine, putting a stainless steel rearview mirror into a mold for fixing, carrying out injection molding on the rubber compound, vulcanizing for 10 minutes at the temperature of 175 ℃ and under the pressure of 12MPa, and finally curing to obtain the rearview mirror.
Examples 2-5 were prepared in the same manner as in example 1, under the following process conditions:
example 2
The natural rubber in this example was kneaded at 25 ℃ and 110 ℃. The temperature of the injection molding machine is 170 ℃, the pressure is 10MPa, and the vulcanization is carried out for 10 min.
Example 3
The plastication temperature in this example was 35 ℃ and the roll temperature of the kneading vulcanizer was 110 ℃. The temperature of the injection molding machine is 175 ℃, the pressure is 15MPa, and the vulcanization is carried out for 10 min.
Example 4
In this example, the plastication temperature was 25 ℃, the kneading temperature was 120 ℃, the temperature of the injection molding machine was 175 ℃, the pressure was 12MPa, and the vulcanization was carried out for 10 min.
Example 5
In this example, the plastication temperature was 35 ℃, the kneading temperature was 120 ℃, the temperature of the injection molding machine was 180 ℃, the pressure was 15MPa, and the vulcanization was carried out for 10 min.
The performance data of the multifunctional memory type rearview mirror portions of examples 1 to 5 are shown in table 1. As can be seen from the table 1, the special forming mode of the multifunctional memory type rearview mirror shell prepared by the invention can prevent the rearview mirror shell from being damaged by collision, the multifunctional memory type rearview mirror shell has good elasticity, high strength and higher practicability, and the multifunctional memory type rearview mirror shell prepared by the preparation method can be used all the year round without worrying about the problems of precooling, embrittlement and the like. The situation that the field of vision of the rearview mirror is fuzzy in rainy days can be avoided after the stainless steel lens is installed on the rearview mirror shell.
TABLE 1 Properties of mirror cases of examples 1 to 5
Claims (7)
1. A method for preparing a multifunctional memory type backing mirror is characterized in that natural rubber is independently plasticated during raw material preparation, the natural rubber and butadiene rubber are jointly mixed by adopting a back mixing method during mixing, a stainless steel backing mirror is placed into a mold for fixing, then the obtained mixed rubber is subjected to injection molding, and finally the mixed rubber is solidified into the backing mirror.
2. The method for preparing a multifunctional memory type rearview mirror as claimed in claim 1, wherein the stainless steel rearview mirror is fixed in a mold, and a blower is used to blow air from the mounting hole of the rearview mirror housing, so that the mirror and the mirror housing have a certain hollow layer to prevent the mirror from being damaged in collision.
3. The method as claimed in claim 1, wherein the stainless steel backing mirror is fixed in a rubber case in a mold.
4. The preparation method of the multifunctional memory type rearview mirror according to claim 1, wherein the mass ratio of the raw materials of the natural rubber, the butadiene rubber and the compounding agent for preparing the rearview mirror is 60: 40: 50.5.
5. the preparation method of the multifunctional memory type rearview mirror as claimed in claim 1, wherein the independent plastication process condition of the natural rubber is 25-35 ℃ for 30 minutes; the process conditions for mixing the two rubbers together are that the temperature is 110-120 ℃ and the time is 10 minutes.
6. The method for preparing a multifunctional memory type rearview mirror as claimed in claim 1, wherein the temperature is reduced when a vulcanizing agent is added after mixing.
7. The method for preparing the multifunctional memory type rearview mirror as claimed in claim 1, wherein the rubber compound is injected into a mold with a temperature of 170-180 ℃ and cured and molded under a pressure of 10-15 MPa for 10-12 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118892.8A CN109824946B (en) | 2019-02-18 | 2019-02-18 | Preparation method of multifunctional memory type rearview mirror |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118892.8A CN109824946B (en) | 2019-02-18 | 2019-02-18 | Preparation method of multifunctional memory type rearview mirror |
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| Publication Number | Publication Date |
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| CN109824946A CN109824946A (en) | 2019-05-31 |
| CN109824946B true CN109824946B (en) | 2021-04-20 |
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| CN201910118892.8A Expired - Fee Related CN109824946B (en) | 2019-02-18 | 2019-02-18 | Preparation method of multifunctional memory type rearview mirror |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274703A (en) * | 2016-08-24 | 2017-01-04 | 张晓鸣 | A kind of automobile rearview mirror |
| CN108570185A (en) * | 2017-11-08 | 2018-09-25 | 李怡嫱 | A kind of anti-aging rubber composite material and preparation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7678849B2 (en) * | 2005-03-29 | 2010-03-16 | Honda Motor Co., Ltd. | High chroma hals stabilized polymer composition |
| US8889769B2 (en) * | 2011-06-27 | 2014-11-18 | Basf Se | Weathering-resistant polyester molding compositions with styrene copolymers |
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- 2019-02-18 CN CN201910118892.8A patent/CN109824946B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274703A (en) * | 2016-08-24 | 2017-01-04 | 张晓鸣 | A kind of automobile rearview mirror |
| CN108570185A (en) * | 2017-11-08 | 2018-09-25 | 李怡嫱 | A kind of anti-aging rubber composite material and preparation method |
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